Phyllogomphoides, Belle, 1970

Torres-Pachón, Mónica, Novelo-Gutiérrez, Rodolfo & Ruiz-Sanchez, Eduardo, 2019, A synopsis of Phyllogomphoides Belle, 1970 (Odonata: Gomphidae) of Mexico: taxonomy and distribution, Zootaxa 4634 (1), pp. 1-67 : 11-12

Key to adult females of Phyllogomphoides from Mexico

1 Vulvar lamina with a posterodorsal tubercle ( Figs. 119–120, 123–124, 127–128 , 139–140 )........................... 2

1’ Vulvar lamina without a posterodorsal tubercle ( Figs. 121–122, 125–126, 129–138 )................................ 5

2(1) Foliation on S8 poorly to moderately developed (0.10–0.43 mm width), foliation on S9 straight ( Figs. 110, 112 , 118 ); S8–9 black dorsally ( Figs. 110, 112 , 118 ); cerci basally dark brown; vulvar lamina variable, its posterodorsal margin more or less straight; three or five pale stripes on pterothorax............................................................. 3

2’ Foliation on S8 well-developed (0.62–1.0 mm width), foliation on S9 strongly convex at middle ( Fig. 108 ); S8–9 with a large, apical, yellow spot on dorsolateral surface ( Fig. 108 ); cerci yellow; vulvar lamina V-shaped ( Fig. 119–120 ), light reddishbrown, its posterodorsal margin strongly concave; five pale stripes on pterothorax.......................... P. albrighti

3(2) Five pale stripes on pterothorax; vulvar lamina V-shaped, reddish-brown, tips separated each other by a distance equal or shorter than basal width of each lobe ( Figs. 127 , 139 )............................................................ 4

3’ Three pale stripes on pterothorax ( Fig. 19 ); vulvar lamina widely U-shaped, black, tips separated each other by a distance shorter than basal width of each lobe ( Figs. 123–124 ).................................................. P. bifasciatus

4(3) Cercus shorter than dorsal length of S9, its basal 0.16 blackish-brown, remaining creamy pale; tip of lobes of vulvar lamina separated each other by a distance shorter than the basal width of each lobe, posterodorsal margin straight with a large (0.08 mm length), digitiform, blunt tubercle directed dorsolaterally ( Figs. 127–128 ); posterior margin of lateral ocelli with a twin tubercle................................................................................. P. duodentatus

4’ Cercus longer than dorsal length of S9, its basal 0.50 blackish-brown, remaining creamy pale; tip of lobes of vulvar lamina separated each other by a distance equal to basal width of each lobe, posterodorsal margin with a short (less than 0.08 mm length), wide, rounded tubercle directed dorsolaterally ( Figs. 139–140 ); posterior margin of lateral ocelli with a single tubercle................................................................................................... P. suasus 5(1’) Foliation on S8 moderately to well-developed, maximum width usually more than 0.25 mm, its ventral margin spiny ( Figs. 109, 111, 113 , 114, 116, 117 )................................................................................ 6

5’ Foliation on S8 poorly developed, maximum width less than 0.2 mm, its ventral margin smooth and straight ( Fig. 115 )................................................................................................. P. pacificus

6(5) Foliation on S8 with posterior lobe not surpassing basal margin of S9 ( Figs. 114, 116 )............................... 7

6’ Foliation on S8 with posterior lobe surpassing basal margin of S9 ( Figs. 109, 111, 113 , 117 ).......................... 8

7(6) Three pale stripes on pterothorax; – widely U-shaped, lobes black foliation, trapezoid on S8, tips well-developed truncate, separated, maximum each width other by 0.6a distance 0.7 mm (shorter Fig. 114 than); lobes basal of width vulvar of each lamina lobe ( Figs. 131–132 )................................................................... P. nayaritensis

7’ Five pale stripes on pterothorax; foliation on S8 moderately developed, maximum width 0.25–0.32 mm ( Fig. 116 ); lobes of vulvar lamina widely V-shaped, triangular, reddish-black, tips separated each other by a distance greater than basal width of each lobe ( Figs. 135–136 )...................................................................... P. pugnifer

8(6’) Inferior margin of S8–10 reddish-black to black; vulvar lamina blackish-brown; cerci creamy pale, usually dark brown at extreme base ( Figs. 109, 111, 113 ).......................................................................... 9

8’ Inferior margin of S8–9, and S10 mostly or completely light yellowish-brown; vulvar lamina reddish-brown; cerci yellow ( Fig. 117 )...................................................................................... P. stigmatus

9(8) Foliation on S8 increasing suddenly in width caudally, inferior margin strongly convex ( Figs. 109, 111 )................ 10

9’ Foliation on S8 increasing gradually in width caudally, inferior margin more or less straight ( Fig. 113 ); basal third of cerci dark brown.......................................................................................... P. luisi

10(9) Cerci shorter than dorsal length of S9, dark brown at extreme base; S10 yellowish-red dorsolaterally, ventrally black ( Fig. 109 ); lobes of epiproct black........................................................................ P. apiculatus

10’ Cerci as long or little longer than dorsal length of S9, creamy pale; S10 light yellowish-brown ventrally reddish-black ( Fig. 111 ); lobes of epiproct dark reddish-brown with a large, yellow, apical, oval spot............................ P. danieli

Figures

FIGURES 119–130. Female vulvar lamina, ventral and ventrolateral view. 119–120) P. albrighti; 121–122) P. apiculatus; 123–124) P. bifasciatus; 125–126) P. danieli; 127–128) P. duodentatus; 129–130) P. luisi.

FIGURES 131–140. Female vulvar lamina, ventral and ventrolateral view. 131–132) P. nayaritensis; 133–134) P. pacificus; 135–136) P. pugnifer; 137–138) P. stigmatus; 139–140) P. suasus.

FIGURES 108–113. Female abdominal segments S8–10 and caudal appendages, left lateral view. 108) P. albrighti; 109) P. apiculatus; 110) P. bifasciatus; 111) P. danieli; 112) P. duodentatus; 113) P. luisi.

FIGURES 114–118. Female abdominal segments S8–10 and caudal appendages, left lateral view. 114) P. nayaritensis; 115) P. pacificus; 116) P. pugnifer; 117) P. stigmatus; 118) P. suasus.

FIGURES 17–22. Head and thorax, lateral view. 17) P. albrighti, male; 18) P. apiculatus, male; 19) P. bifasciatus, female; 20) P. danieli, male; 21) P. duodentatus, male; 22) P. enriquei, male.